Seeing Is Not Necessarily Believing: Is the Surface-Enhanced Raman Spectroscopy Signal Really from the Target?

被引:3
|
作者
Pan, Si-Qi [1 ]
Luo, Ping [2 ]
Chen, Jia [3 ,4 ]
Wu, Tairui [2 ]
Xu, Bin [3 ,4 ]
Chen, Fushan [2 ]
Wu, De-Yin [2 ]
Ren, Bin [2 ]
Liu, Guo-Kun [1 ]
Xie, Jianwei [3 ,4 ]
Xu, Pengxiang [2 ]
Tian, Zhong-Qun [2 ]
机构
[1] Xiamen Univ, Coll Environm & Ecol, Ctr Marine Environm Chem & Toxicol, State Key Lab Marine Environm Sci,Fujian Prov Key, Xiamen 361102, Peoples R China
[2] Xiamen Univ, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China
[3] Acad Mil Med Sci, Inst Pharmacol & Toxicol, State Key Lab Toxicol & Med Countermeasures, Beijing 100850, Peoples R China
[4] Acad Mil Med Sci, Inst Pharmacol & Toxicol, Lab Toxicant Anal, Beijing 100850, Peoples R China
关键词
NANOPARTICLES; AG; MOLECULES; IMPURITIES; SCATTERING;
D O I
10.1021/acs.analchem.3c02683
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Reagent purity is crucial to experimental research, considering that the ignorance of ultratrace impurities may induce wrong conclusions in either revealing the reaction nature or qualifying the target. Specifically, in the field of surface science, the strong interaction between the impurity and the surface will bring a non-negligible negative effect. Surface-enhanced Raman spectroscopy (SERS) is a highly surface-sensitive technique, providing fingerprint identification and near-single molecule sensitivity. In the SERS analysis of trace chloromethyl diethyl phosphate (DECMP), we figured out that the SERS performance of DECMP is significantly distorted by the trace impurities from DECMP. With the aid of gas chromatography-based techniques, one strongly interfering impurity (2,2-dichloro-N,N-dimethylacetamide), the byproduct during the synthesis of DECMP, was confirmed. Furthermore, the nonignorable interference of impurities on the SERS measurement of NaBr, NaI, or sulfadiazine was also observed. The generality ignited us to refresh and consolidate the guideline for the reliable SERS qualitative analysis, by which the potential misleading brought by ultratrace impurities, especially those strongly adsorbed on Au or Ag surfaces, could be well excluded.
引用
收藏
页码:13346 / 13352
页数:7
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